交换有La^(3+)离子的NaA型分子筛的交流电导研究  

The Ionic Conductivity of Sodium Zeolite A Exchanged With Different Lanthanum Contents

作　　者：郝金库[1] 方延铨[2] 赵维君[2] 张书笈[2] 

机构地区：[1]天津师范大学化学系,天津300074 [2]南开大学化学系,天津300071

出　　处：《离子交换与吸附》1993年第1期5-8,共4页Ion Exchange and Adsorption

摘　　要：本文用X—光射线衍射、原子吸收光谱及热重等方法测定了交换有La^(3+)离子的NaA分子筛LaNaA的组成,用交流阻抗谱测定了其离子电导,由电导率随温度的变化,得到了NaA和LaNaA的电导表观活化能分别为54.9KJ/mol和37.6KJ/mol。讨论了交换有La^(3+)离子后对分子筛骨架结构中Na^+离子分布、落位以及扩散迁移的影响。The ionic conductivity of sodium zeolite A exchanged with different lanthanum contents has been studied. The correlation between the activation energy and the numbers of lanthanum ion per unit cell indicates that the lanthanum ion makes a change in distribution of sodium ions that gives a rise to decrease in the activation energy in diffusion of sodium ions in zeolite A.

关 键 词：镧离子 分子筛 交流电导 

分 类 号：O647.33[理学—物理化学]